<head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta charset="UTF-8">
    <title th:text="${title}"></title>
    <link th:href="@{/css/common.css}" type="text/css" rel="stylesheet">
    <!--/*  seo优化用，先注释掉完善权限安全框架后再加上  */-->
    <!--<meta name="copyright" th:content="${siteInfo.copyright}" />
    <meta name="description" th:content="${siteInfo.description}"/>
    <meta name="keywords" th:content="${siteInfo.keywords}"/>-->
</head>